Key punch multiplying machine



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Aug. 22, 1939.

liled Oct. 4, 1952 J. W. BRYCE KEY PUNCH MULTIPLYING MACHINE l5Sheets-Sheet 1 und Illul In! iwal y@ @als INVENUR wirf@ ATTORNEYS Aug.22, 1939. 1 W BRYCE 2,170,543

KEY PUNCH MULTIPLYING MACHINE 'ux-EN on WMZL im ATTORNEY s Aug. 22,1939.

J. W. BRYCE KEY PUNCH MULTIPLYING MACHINE Filed oct. 4, 1932 15sheets-sheet :5

Aug. 22, 1939. .1. w. BRYCE KEY PUNCH MULTIPLYING MACHINE l5Sheets-Sheet 4 Filed OCT.. 4, 1952 A .NB

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f ATTORNEYS Aug. 22, 1939. .1. w. BRYCE KEY PUNCH MULTIPLYING MACHINEFiled Oct. 4, 1932 l5 Sheets-Sheet 5 NTOR s oonoooop@ como 4&7@- MATTORNEYf Aug. 22, 1939. .1. w. BRYCE KEY PUNCH MULTIVPLYING MACHINEFiled Oct. 4, 1932 15 Sheets-Sheet 6 MTORNEYJ` Aug. 22, 1939.

J. W. BRYCE KEY PUNCH MULTIPLYING MACHINE Filed Oct. 4, 1932 l5Sheets-Sheet 7 fWM ATTORNEYS Aug. 22, 1939. J. w. BRYCE 2,170,543

KEY PUNCH MULTIPLYING MACHINE Filed Oct. 4, 1932 15 Sheets-Sheet 8 ATroRNEY Aug. 22, 1939. .L w. BRYcE KEY PUNCH MULTIPLYING MACHINE FiledOct. 4, 1932 l 15 Sheets-Sheet 9 w m 4 .al/v 8 b 2 l lll-0 3 6 9 m 5 f.r. fm 7 W m w, 4 M m www a A 4MM m Jr it: e. fm. n3. k A F l@ Aug. 22,1939.

J. w. BRYCE KEY PUNCH MULTIPLYING MACHINE Filed Oct. 4, 1932 l5Sheets-Sheet 10 Aug. 22, 1939. `.1. w. BRYE 2,170,543

KEY PUNCH MULTIPLYING MACHINE Filed Oct. 4, 1952 l5 Sheets-Sheet l1 ZlNv .NT ab tn/ fuv ATTORNEY F IGJSb.

Aug. 22, 1939. J. w. BRYCE KEY PUNCH MULTIPLYING MACHINE Filed Oct. 4,1932 15 Sheets-Sheet 12 www om Im nD D D D D D D D D D D D @D p D D mD DD D D D D D mD D D D D D D .D D D D QD D D D 1N EN-roR Y yw ATroRNEYAug. 22, 1939. J. w. BRYCE 2,170,543

KEY PUNCH MULTIPLYING MACHINE Filed OC't. 4, 1932 l5 Sheets-Sheet l5 mtlATTORNEY5 Filed Oct. 4, 1932 l5 SheetsSheet 14 WNR@ Aug. 22, 1939. J. w.BRYCE KEY PUNCH MULTIPLYING MACHINE Filed oct. 4, 1932 15 sheets-sheet15 KHE! EN ENT R l/Www ATTORNEYS l Patented Aug. 22, 1939 UNITED STATESY PATENT OFFICE KEY PUNCH MULTIPLYING MACHINE poration of New YorkApplication october 4, 1932, serial No. 636,109

14 Claims. (Cl. 235--61) In my copending application, Serial No. 244,-594, led January 5, 1928, a machine was shown wherein a punching unitwas provided with an associated computing mechanism. Provision was emade for punching record cards with factor data pertaining to the amountof the multiplier and multiplicand and as this factor data was enteredthe multiplicand was stored in an entry receiving device Which was inthe form of a counter.

19 Subsequently on the punching in o f the multiplier the amount of thestored multiplicand was multiplied by the amount ofthe multiplier,column by column as the multiplier amount was punched on the card. Uponthe completion of 15- the entry of the multiplier, provision was madefor automatically reading back and punching upon the record the computedproduct. With the machine of the aforesaid application the computingmechanism involved combinational set-up product representing devices ofa rather complicated nature. The card handling section of the punchfurthermore was hand controlled so that the operator of the machine inpunching up and computing a succession of record cards had to 25/perform certain card handling operations entirely by hand after onecomputation had been completed and before starting to punch up a cardfor a succeeding computation.

The present invention has for its general objects a simplification ofthe previous machine and the provisions of an improved structure, theelimination of the combinational product representing devices, theprovision of automatic card handling means in the punch in lieu ofmanual card handling devices and in general the provision of a machinewherein less skill is required on the part of the operator in effectingcomputing operations than with the previous machine above referred to.

Other objects of the present invention relate to the provision ofimproved inter-control circuits and improved automatic operationinitiation circuits for the machine to the general end that accuracy ofresults may be obtained by relatively unskilled operators.

Further and other objects'oi thepresent invention will be hereinafterset forth in the accompanying specification and claims and shown in thedrawings, Which show by Way of illustration what I now consider to be apreferred embodiment of the present invention.

In the drawings:

Figure l is a top plan view of the machine;

Figs. 2 and 2a taken together show diagrammatically certain of theelements of the machine including the accumulating devices, themultiplier, column shifting and other controlling multicontact relaysand the drive therefor;

Fig. 3 shows somewhat dagrammatically the arrangement of the readoutdevice which is used for the left hand accumulator of the machine;

Fig. 4 is a fragmentary top plan view of this readout;

Figs. 5 and 5a taken together show a somev lare used for multiplicationselection, column shift and for other control purposes where multiplecircuits are to be established or broken concurrently;

Fig. 8 is a detail sectional view taken substantially on line 8-8 ofFig. 'l and showing a multicontact relay in a preliminary moved anddisplaced position preparatory to being electromagnetically tripped andwith the strain relieved from the latch point of the relay;

Fig. 9 shows somewhat diagrammatically the arrangement of the RHRO(righthand accumulator) readout device;

Fig. 10 is a top plan view of this readout and Fig. 11 is a detailsectional view;

Fig. 12 is a transverse sectional View of a portion of the punchingmechanism of the machine and this view also shows the arrangement ofcontacts operated by the keys of the punch. The section is takensubstantially on line l2-l2 of Fig. 1;

Fig. 12a is a detail view of certain controlling contacts on the punch,the view being taken substantially on line 12a-|20, of Fig. 14 andlooking in the direction of the arrows;

Fig. 12b is a diagrammatic view showing the contacts operated by the keystems of the key punch;

Fig. 13 is a detail sectional view showing certain driving shafts andthe drive to the punching mechanism. The section is taken substantiallyon line I3-l3 of Fig. l and looking in the direction of the arrows;

Fig. y14 is` a vertical sectional detail of the punch, the section beingtaken on line llli4 of Fig. l2;

Figs. 15a, 15b, 15e and 15d taken' together and arranged vertically inthe order named, show the complete circuit diagram of the machine; and

Figs. 16a 'and 1Gb taken together show the timing diagram of themachine.

Before describing the details of the various parts of the machine, ageneral description will be given of the various units and theirlocation in the machine. The machine embodies a card handling and cardpunching mechanism which is shown in the lower right hand corner of Fig.1 and also shown in Figs. 5 and 5a. This punch is of the automaticrepetition punching column by column type and is provided with a cardmagazine from which the cards are withdrawn one by one and advanced pastthe punching station and finally discharged into a discharge magazinewhich is shown at the extreme left in Fig. 1. The punch is.of the tenkey successive column punching type.

The machine also includes two accumulators which are shown in the upperleft hand corner of Fig. 1 and in Fig. 2. One accumulator is designatedLH for receiving left hand components of partial products and the other`accumulator is designated RH for receiving right hand components ofpartial products.

The machine also includes a multiplying panel relay unit shown in Figs.1 and 2 and designated MPR. There is also provided a column shift unitgenerally designated CS and certain additional multi-contact relaysgenerally designated CR are located in the CS section of the machine(see Fig. 2a). The machine also includes a number of emitter mechanismsand certain cam contact devices which will be subsequently described.

Machine drive The machine is adapted to be driven by a constantlyrunning motor M (Fig. 2a). This motor through a belt and pulley andratchet drive drives a shaft 5l which shaft in turn drives an A. C.D. C.generator 52. The generator 52 is adapted to produce alternating currentimpulses for actuating various accumulatore and relay magnets. Thegenerator 52 also has a D. C. (direct current) take-off section. Shaft5| through worm gear drive 53 drives a vertical shaft 54 which shaftdrives the accumulator unit, the MPR unit and the CR and CS units. Shaft54 at its upper end through worm gearing 55 is adapted to drive theaccumulator drive shaft 56 of the machine. The LH and RH accumulatorsare driven from this accumultor drive shaft. in the customary manner.Reset of the accumulators is provided for as follows. Shaft 56 isprovided with a spur gear 51 driving a gear 58 with a four to onedriving ratio. Gear 58 has extending from it four Geneva pins 59cooperating with the other or cross element of the Geneva designated 60.Secured to element 60 is an internal gear 6| cooperating with a spurgear 62 mounted on the end of the reset shaft 63. The usualelectromagnetic reset clutches provide for the reset of the LHaccumulator and the RH accumulator.

Shaft 56 also drives operating cams 65 (F1g`s. 2 and 2a) which cams areadapted to operate bell crank follower members 66 and slidably shiftserrated operating bars 61 for the multicontact relay devices.

Punching machine drive Referring to Fig. 2a, a gear 88 on shaft 56drives a gear 69 fast to a shaft .10 (see also Fig. 13). The punching-mechanism generally is of the form shown in Lee and Phillips UnitedStates Patent No. 1,772,186, and also in the form shown in United Statespatent to Lee and Daly, No. 1,976,618, dated October 9, 1934. Certainfeatures of the punch are also shown and more fully described in UnitedStates patent to George F. Daly, No. 1,950,485, dated March 13, 1934.Other features of the punch are shown in patents to Schaaff No.1,803,979, dated May 5, 1931, and No. 1,821,078, dated September 1,1931.

In general it may be stated that the punching mechanism includes asupply magazine generally designated 1| in Fig. l and in Fig. 5a Rdesignates a record card in the undermost position in the supplymagazine 1|. The punching mechanism includes two card feed racks 8| and82. 82 has suitable pusher fingers 83 attached to an arm extendingtherefrom. The shaft 10, previously referred to, has a ratchet shapedclutch element 84 fixed on one end of it. Alongside of 84 is a gear 85which meshes with the lower teeth of 8|. Secured to 85 is a disk 86.Pivoted on this disk 86 is a member 81 provided with a ratchet shapedclutch tooth 88. Alongside of member 81 is another member 81h whichlacks the clutch tooth. On 81 is a pin 89 overlying an arcuate segmentof part 81h. The free end of 81h is connected to a toggle member 90 bymeans of a link 9|. 90 is pivoted on disk 86 at 92. The opposite end of90 remote from its pivot 92 is connected to a spring element 93. Spring93 tends to hold the clutch tooth 88 out of engagement with the clutchteeth of element 84 and allows it to engage when part 90 is shifted.

For the purpose of effecting a clutching action punch clutch feed magnet94 is provided. This magnet when energized attracts its armature,causing an arm 95 to .engage a pin 96, depressing 81h and allowing 81 todescend so that the tooth 88 engages with the ratchet 84. Upon suchengagement the gear will be driven in a counter-clockwise directionsubstantially a single revolution, shifting rack 8| to the left. Thisaction through the card pusher shown in Fig. 5a withdraws a card fromthe card magazine 1| at the R position and moves it to the R-l position.

At the termination of the counter-clockwise movement of gear 85 thetails 91 of parts 81 4and 81h will strike a projection 98 on a fixedplate to effect the disengagement of the tooth 88 from the ratchet wheel84. This action also restores the toggle parts to normal position.

The above driving action has wound up a spring in barrel 99. Upondisengagement of the one revolution clutch 88-84, previously referredto, the rack 8| returns to the right under the infiuence of the springpower of the spring in barrel 99.

The driving train to the second card carriage rack 82 will now bedescribed. Rack 8| has its upper teeth intermeshed with gear |00. Gear|00 has secured to it a member |0| (see also Fig. 6) having a singlenotch or tooth disposed in the plane of a pawl |02 which is pivoted onpart |03, which part |03 is fixed to the shaft |04. Shaft |04 on itsopposite end has a gear |05 which meshes with the card carriage rack 82.Suitable mechanism shown in Fig. 6 controls the co-action of pawl |02with the member |0| so that with the rack 8| in extreme right handposition the pawl |02 will be disengaged from the clutch element |0| bythe rocking of part |06 in a clockwise direction by the co-action of apin |01 with the block |08 carried on rack 8|. Upon initial movement of8| to the left the block |08 will clear the pivoted oamming abutment |06allowing a slight counter-clockwise motion of it so that |02 underspring action may rock and engage the tooth of member Thereafter drivewill come from ,8| through gear |00,

through |0| to pawl |02, part |03, to shaft |04 so that a clockwiserotational movement will be imparted to |04 and to gear |05. Rack 82will thereupon be traversed to the right. The card carriage rack 82 willthus be shifted to extreme right hand position permitting the cardpushers 83 to first ride over the surface of the card under the pushersand ultimately engage back of the trailing edge of the card at the Rf-Iposition. Rack 82 has associated with it a -spring driving devicecomprising the usual spring barrel generallyv designated |09. Thisspring device is Wound up by the traverse of 82 to the right and causesa subsequent movement of the rack 82 to the left under spring action.Rack 82 has also associated with it the escapement mechanism ||0 havinga dog ||0a.. This escapement is of the type fully described in SchaaiPatent No. 1,426,- 223, dated August 15, 1922, and in the LeeandPhillips Patent No. 1,772,186. Removably secured to the card carriagerack 82 is a skip bar provided with notched portions ||2 which permitthe skip lifter lever ||3 to descend when in the notch or remainelevated when riding on the high part of the skip bar. When the skiplifter lever descends into the notches it allows the dog ||0a of theescapement mechanism to cooperate with the ratchet teeth of rack 82.With the skip lifter lever ||3 riding on the top of the skip bar theescapement will be disabled so that the card carriage rack 82 cantraverse without stopping at each card column until the notched portions||2 are reached. Thereafter there is an intermittent motion of the cardcarriage to the left under spring action under escapement control. Whenthe skip lifter lever nally rides out of the notched part the cardcarriage rack 82 takes its full excursion of movement to `the left. Thelocation of the beginning of the rst notch in the skip bar determinesthe position for the beginning of punching. If desired and as` shown,multiple notches may be provided in the skip bar one for themultiplicand, another for the multiplier and another for the product. Orif desired a long single notch can be provided of sufficient length topermit the punching of a suitable number of columns for themultiplicand, thel multiplier and product. Supplemental notches forother data. can also be provided if desired.

When escapement dog ||0a is lifted, certain contacts I4 and ||5 areprovided which are arranged to open. Contacts ||4 are the customaryescapement contacts and contacts ||5 are supplemental contacts which arearranged to open up upon elevation ofthe escapement dog ||0a.

The punching mechanism proper need not be fully described as it is fullyset forth in Lee and Phillips U. S. patents above referred to and Leeand Daly United States Patent No 1,976,618. In brief the punchingmechanism comprises a number of punches ||6 (Figs. 5 and 12) whichpunches are adapted to be depressed to perforate the card under thecontrol of interposers ||1. The interposers are depressed by anoperating bail ||9 pivoted at |20. Interposer operating bail ||9 ismagnetically operated by means of the punching magnet |2|. Theconnections to the bail ||9 from the armature of the punching magnet |2|are by means of a link |22, bell crank |23, in turn connected to'a link|24, which in turn is connected to rock bail ||9 anti-clockwise aboutits pivot. The interposers ||1 are selectively thrust forward to bringabout punching action by means of the usual punch keys |30 or by theenergization of punch selector magnets |3|. The energization of magnet|2| is eiected under interposer control. Under interposer action, a bail|32 is adapted to be rocked upon the thrusting forward of anyinterposer. Rocking of the bail |32, through a link |33, is adapted toclose contacts |34 and bring about an energization of magnet |2 As iscustomary in machines of this class, the contacts |34 immediately openafter the magnet |2| has been energized and attracted its armature andbrought about a punching operation.

As is customary in machines of this class provision is made forpreventing the concurrent depression of two punch keys with theconcurrent thrusting forward of two interposers. The interlocklngdevices that are provided are generally designated at |35 andcorresponding to the interlocking devices shown in Fig. 13 of SchaaffUnited States Patent No. 1,803,979. In the punching mechanism provisionis made under certain conditions to prevent too early restoration of theinterposers ||1 to normal right hand position. Such control is providedin the following manner. Each interposer is provided with a notch |36,adapted to receive a spring pressed pawl |31 upon the advance of theinterposer to the left. Such pawl prevents the return movement of theinterposer until the pawl is Withdrawn from the notch. 4Withdrawal ofthe pawls from the notches of all the interposers is effected by bail|38 which is adapted to be rocked by a magnet |39 (see also Fig. 14).

In the present machine supplemental contacts |40 are provided, whichcontacts are normally open con acts and which are close'd concurrentlywith contacts |34 and are opened concurrently with the opening ofcontacts |34. The bail |32 which is adapted for the control of contacts|34 and |40 also operaes certain supplemental contacts which are on theoutside of the machine (see Figs. 14 and 12a). For this purpose theshaft 4| which carries the bail |32 has a contact operating arm |42secured thereto adapted upon the rocking of the bail |32 loshift thethree-blade contact so as to open contacts |43 and close contacts |44.

Each of the digit keys of the punch and the zero key is also adapted tooperate an individual set The lower stem of each of three-bladecontacts. key shank (see also Fig. 12b) cooperates with an insulatedmember |45 so that upon the depression of any punch numeral key a pairof contacts |46 will be closed and a pair of contacts |41 will beopened. ItV will be understood that each digit key of the punch isadapted to operate an individual set of such three-blade contacts.

Referring again to Fig. 5, disposed alongside card carriage rack 82 andfixed to the frame of the machine, is a block or strip of insulatingmaterial |48. Disposed in this block of insulating material are a numberof spo's |49 of conducting material and alongside these spots is acommon strip of conducting material |50. A suitable br'dging piece ormultiple brush assembly |5| is carried by the card carriage ra'ck 82 andas the card carriage rack moves the bridging brush |5| is displaced andestablishes circuit connections from the common bar |50 to a particularone of the spots |49 depending upon the columnar position of the cardcarriage rack 82. For accuracy of spacing, the conducting spots |49 areplaced in two rows, the spots of the lower row being inter-staggeredwith the spots on the upper row.

Referring to Figs. 5 and 5a, rack 82 carries an arm |52 which carries anumber of brushes |53a suitably insulated from each other and from thebracket |52 are also carried a pair of brushes |53b and another pair ofbrushes |530. The brushes |53a, |532) and |5370 are adapted to betraversed upon the movement of the rack 82 over two staiionarycommutators one commutator is designated |55 and the other |55. Thestationary commutators can be set in any desired position in accordancewith the elds of the card which are to receive multiplicand andmultiplier perforations. To permit the shifting of the stationarycommutators they are mounted in upper and lower frame members |56provided with a number of tapped holes to receive the commutators invarious selective positions corresponding to the columns of the card.Members |56 are stationary members attached to the frame of the machine(see Fig. l).

Card ejector Referring to Fig.5 after the card has reached the R-iposition and has been traversed past the punches il@ and has beenpunched, it ultimately reaches a position at the extreme left hand endof the punching section of the machine from which point it must bedischarged into a discharge hopper. The card eject mechanism is shown inFig. 5 with the parts shown in the position which they assume before themachine was started in operation. Upon the iirst card feeding operation,rack 8| will have moved towards its extreme left position. Afterreaching the dotted line position shown in Fig. 5, ill moves further tothe left and thrusts a rack il to the left compressing coil spring i58.Bearing against a shoulder on the rack |57 is a contact operating partld. When |5i is thrust to the left contacts P--S which were previouslyclosed will open under their own spring action. The displacement of llto the extreme left position will, through intermediate gears iii@ rocka shaft itl in a clockwise direction to bring the ejector clipassemblage it away from the posiion shown in Fig. 5 to a position inwhich the ejector clip can receive a card which has been advancedthrough the puunching section of the machine. With the ejector clipassemblage l? disposed in such y card receiving position the assemblagewill be latched in such position by a latch |63. The latch |63 isadapted to be released by an eject magnet Hill. Upon energization of theeject magnet 96d the ejector clip assemblage |62 has grasped a card,swings from the card receiving position to the position shown in Fig. 5,in which position the jaws of the ejector are opened up so that a cardcan be discharged therefrom.

Contact devices in the punching section o1 the machine Contact devicesP-3 controlled by |51' have been described. Also at the dischargemagazine end of the punch are contacts P d. An extension |65 on the rack82 is adapted to close contacts P- when the rack 82 has passed lloeyondthe last card column position an-d to allow these contacts P-l to openwhen the rack 82 moves to the right to any of its other positions.

which are adapted to be closed when any cards are in the supply magazineand to automatically open up upon exhaustion of cards from the magazine.g

Accumulators The LH accumulator and the RH accumulator (see Fg. 2) areof the usual type as customarily used in tabulating machines and areprovided with electromagnetically actuated clutches. The LH accumulatoris provided with a reset magnet BBLH to control the reset of theaccumulator from the reset shaft S3 and the RH accumulator is providedwith its reset magnet itRl-I. Contacts ll are associated with the LHaccumulator and such contacts are arranged to be opened upon the resetof the accumulator and to reclose when the reset is complete. Contacts|68 are associated with the RH accumulator and are arranged to closeupon the reset of the accumulator and to reopen upon completion of theresetting operation.

Two emitters of conventional form are provided designated |69 and il@respectively, with their brush assemblages driven from the mainaccumulator drive shaft 56. The customary cam contacts are likew'provided driven from the shaft 56 and the cams of these contacts aredesignated CC-i to 8.

Readout devices Fig. 3 shows the arrangement of the readout device forthe LH accumulator. In this readout the units clutch gear train illdrives a units brush ilZU which cooperates with a set of segments H3 andwhich brush receives current from the common conducting segment lill.Also cooperating with the segments |73 is a brush i`l2T which brushassemblage is driven from the tens order clutch train W5. Brush il2Tcoopcrates with a current supply segment l'l.

It will be noted that the segment ils is provided with ni-ne numberedspots and a zero spot.

The wiring of the readout will hereinafteinappear in connection with thedescription of the circuit diagram but it will be stated that the spotsare transversely connected by buses il'l (see Fig. 4).

Referring now to Figs. 9 to 11 inclusive, the RH readout issubstantially the same so far as its drive is concerned as the LHreadout. The dfilerence in the readout arrangement is in the relation ofthe spots on the segments. On Fig. 9 the segments are designated |'|3aand |131) and it will be noted that there are only nine conducting spotsprovided, no zero spot being employed.

The various segments of the readout are trans. versely wired by buses|i'lb (see Fig. 10).

M ultiplying panel, column shift and muli iple circuit controllingrelays Numerous electromagnetically controlled and mechanicallypositioned/and restored multi-contact relays are used in the machine.The -construction of these relays is shown in Figs. 7 and 8. 'Suitableside frame plates are slotted to receive a number of vertical plates|30. Carried on each plate is a magnet yhiL will be designated CS whenthe relays are used for column shift purposes and X-|, X-2, and X-3,etc., when the relay is used for multiplier selection purposes and CRwhen the relay is to be used for simple multiple circuit controlpurposes. These magnets CS, X or CR. when energized, serve to controlthe establishment or breaking of circuits at the multi-contact points ofthe relay. The magnets are preferably used as trip magnets only and thearmatures of these magnets are not required to shift their relatedcontacts.

As previously explained, the cams 65 shift their respective followers 66and transversely shift the serrated operating bars 61. Each plate |80 inaddition to providing the mounting for the magnets CS, X or CR alsoaffords a mounting for contacts which will be generally designated |8|and |82 Contacts |82 at their upper ends have fastened thereto a stripof insulating material |83 which strip in turn has secured to 1t anL-shaped member |84. The member |84 has an upper portion which engagesinto the downwardly extending serrated notches of the serrated bar 61.Member |84 also has downwardly depending from it and .fixed thereto abracket |85 which in turn has pivotedly mounted on it a latch member|86. This latch member has slight limited rocking movement betweenhunting stop pins and is normally urged clockwise by a spring |81. Thelower end of the pivoted latch member |86 cooperates with a latch piece|89 xed'to a pivotally mounted armature |90. The armature member |90also has an up` wardly extending tail portion |9| arranged incooperative relation with a restoring abutment |92 carried upon anddepending from the serrated operating bar. With the parts shown in theposition of Fig. 8, the cam 65 has shifted its follower 66 and shiftedthe serrated operating bar 61 toa position in which the contacts |8| and|82 are kept open and to a position in which the strain is removedbetween the latch |86 and the latch point |89, of the armatureassemblage. The relay magnet may now be energized and upon beingenergized the latch portion |89 will be lowered allowing the latch |86to trip over the top of the latch point, thereafter upon furtherrotational movement of the cam 65, the serrated operating bar 81 movesto the left and allows contacts |82 to close under their own springaction and establish contact with |8|. After a set of multi-contactshave been tripped and closed in the above manner, the operating cycle ofthe machine ensues and subsequently the cam 65 again shifts itsfollower, causes the operating bar to take a somewhat larger extent ofmovement to the right to lcause the armature knockoff bracket 92 tointercept |9| and rock the armature assemblage in a clockwise] directionto knock off any previously attracted armature. Subsequent movement ofthe cam allows the serrated operating bar to move back to the positionshown in Fig. 8. If a given magnet is not energized, its correspondingarmature will not be attracted and the latch member |89 will thenprevent a closure of contacts |8| and |82.

In the foregoing description the contacts gen- I erally designated |8|and |82 have been described as normally open contacts. Such contacts mayalso be of the normally closed type arranged to open up upon theenergization of a controlling magnet and upon a shift of the serratedoperating bar.

In the subsequent description of the wiring diagram certain contactswhich have been generally designated |8| and |82 in the presentmechanical description of the multi-contact relay, will be givendesignating reference numerals related to their associated controlmagnets. Thus |-CR to will designate the eleven contacts controlled bythe magnet I-CR.

General operation 'When the present accounting machine is to be used,unpunched cards are placed in the supply magazine 1 While generallywholly unpunched cards would be placed in this supply magazine, thecards in the supply magazine may have prepunched perforations in certaincolumns. In the operation of the machine it is intended that the cardsbe punched up one by one with the amount of the multiplicand, the amountof the multiplier and that the machine receive an entry settingaccording to these factors which are so introduced into the machine bythe operation of the punch keys.

The entry receiving means for the multiplicand, according to the presentembodiment, preferably comprises a relay storage device. However, otherentry retaining means could be used. After the amount of themultiplicand has been entered into the multiplicand entry receivingdevice the operator proceeds with the punching of the multiplier. As themultiplier is entered into the machine, column by column, multiplyingproceeds. For example if the first column of the multiplier were 8 themachine would multiply the amount standing in the multiplicand entryreceiving device by 8, create partial products in left and right handcomponents and introduce these components concurrently into the LHaccumulator and the RH accumulator. Thereafter upon a further punchingoperation, say by '7 in the next column of the multiplier there would bea multiplication of the mu.tiplicand amount by 7 and the left and righthand components of partial products would be introduced as before inproper columnar relation into the LH and RH accumulators. This operationwould be continued until the multiplier is completely introduced at.which time the product would be completely computed. Thereafter themachine automatically accumulates in one accumulator, viz., the LHaccumulator, the partial product accumulations from the otheraccumulator and when this operation is completed the machineautomatically punches back the product upon the record in which thefactors were manually punched by the operator of the machine. A

In the present machine, all card handling operations are automatic, themachine automatically presenting a new card in position for punching andautomatically ejecting the card after the product has been punchedthereon and then automatically introducing a new card for a newoperation thereon.

Circuit diagram Before starting up the machine the operator places asupply of cards in the card magazine. The main line switch 201 is closedand supplies current to the driving motor M. Motor M drives the A. C.D.C. generator 52 and supplies alternating current impulses to the bus 289and to ground, and the D. C. end of this generator 52 supplies directcurrent to the buses 2li) and 2| Upon first starting up the machine theracks 8| and 82 will be in the position shown in Figs. 5

